Fertilizer-screen vibrator



April 29, 1930. J. SACKETT 4%51 I FERTILI ZER S GREEN VIBRATOR FiledApril 16, 1929 2 Sheets-Sheet i April- 29, 1930. r A, J; S CKETT1,756,835

' FERTILIZER SCREEN VIBRATOR Fil ed April 16, 1929 2 Sheets-Sheet 2Patented Apr. 29, 1930 UNITED STATES- PATENT or fice AUGUSTUS J.SACKETT, QFiA'NlqErAkUNDEL COUNTY, MARYLAND, ASSIGNOR TO THE A. J.SACKET'I AND sons COMPANY, A CORPORATION or MARYLAND FERTILIZER-SCREENV'ITBR'ATOR Application filed April 16, 1929. Serial No. 355,462.

The inventionrelates to screensof the type used in the grading orscreening of groundor comminuted materials, the apparatus to which theinvention is applied being particur larly adapted to the treatment offertilizer materials, though it is alsov-ac'lapted: to use in; thegrading orscreening of various materials as sand, lime, ground-shell orthe like. The screen to which the invention is applied isofv'the-rotary'oroscillating typeaa-nd preferably of arcuateor-cylgindnical form. I p

In the screen-ingoperation the meshes or screen apertures are in. thetreatment of the majority of the "materials handled, subject to partialor complete clogging by the retention therein of an accumnlati'on'offine-dust or of particles which fit or nearby fit the screen or lessfamiliar in the various branches of the screeningart. The majorityof'these vibrating devices are comparatively complicatedand-imlifned toget; out of; order so that 15 they require attention from time totime-and many OfllllOSQ which are effective are high speed motor driven.vibrators which their operation'consume'an amount of power which is aconsiderable proportion of that required 7,") ii -the main operation ofthe machine i. a,

in rotating or oscillating the screen and feed-- ing the 'material whenand if i t-is fed auto matically.

' The invention felatGSvtO the provision of a vibrator for a-frotatingor oscillating screen of simple, and substantial construction which canbe prfodiiced {cheaply and which isinot apt-to get-out o f o-rderandwhich atthe same time is operated-Without the expenditure of any 1cwer ---in;add-itijonto that required "to rotat-e oroscillatethieiscreen.

Inthe accompanyingdrawing; 1 haveilllls trateda fertilizer screenembodyingtlie feae 131513 95? ef-niy I inventionin the pll-eifiellled91a 'thedrawings;

Figure '1 is a perspective view ofa fertilizer screen of the rotaryoroscill-atory'type, one of the trays or sections being removed todisclose the vibrator with: which it is equipped.

Figure 2 is a side elevation of a, screening machine assembled foroperation.

Figure3 is an end view of the screen cylinder showing one of the spiderscomprising the screen frame and'the vibrators cooperatingtherewith.

Figure 4: is an elevation on an, enlarged scale of one of the vibratorsremoved, the same being taken in the direction of Figure 3, and

Figure 5 is'an elevation of the same vibrator taken at right angles toFigure d.

Referring to the drawings by numerals each of which is used to indicatethe sameor similar parts in the difi'erent'figures, the apparatusillustrated comprises a screen member 1 in the form of a container offora-minous material 2, as wire mesh onscreen cloth, though any varietyof foraminous-material maybe used. This screenmember leas shown iscylindrical in form though it may be of any convenient shape andmountedon as'haft 3 by means of which it may be rotated: or oscillatedin any suitable manner, the supaortin frame and ear connections .bein

b C L71 obvious and'well known in-the'art and form ing no part of thepresent invention. The screen shown has a normal speed of about twentyrevolutions per minute, and it may be driven by a large hevelgear 4 onshaft 3, which bevel gear 4 is engaged by a smaller bevel gear 5 drivenby a pulley 6 which-Q in its turn, driven by a belt 6", The screenmember orcont'ainer 1 iassshown is formed with a feed opening 7concentric with the axis, i. e. with the shaft 3 through which openingthe material to he fat d may he introduced, and h outer wa1 0f heGQntainer r sc e mem er is sho n prising a s rie of sections trays 8, whch as shown are of segmental form and supported 1n any suitable andconvenient man- 'ner as by means of spiders or radial frame members 9secured to the shaft 3 and consisting each of a hub 10 most convenientlysplit as shown, so that it may be mounted on the shaft without passingover the end and provided with a convenient number of radiating arms 11to the ends of which the frames 12 of the sections 8 are secured in anysuitable and convenient manner as by means-of bolts 1% passed throughthe ends of the arms, 11 and through the frames 12.

In the form of the invention shown, the vibratorsor st ikers to bedescribed cooperate with the spiders or frame members 9 and particularlywith the radial arms 11 thereof.

These vibrators may be arranged as to these various details'to suit theconditions in'hand. In accordance with the preferred form shown theyconsist each of a pendulum-like member 15 including a weight or hammermember 16 and an arm17 to one end of which the weight is secured, theother end ofthe arm 17' being pivotally mounted at 18 to permit the armto swing relatively to the shaft.

I In the form of the invention shown, each weight is'provided with'twoarms 17 (see Figure 5) placed side by side and pivotally connected attheir inner ends to splitcollars 19, two of said collars being'in' theform of the invention shown, provided for each spider. These collars 19are'most fully illustrated in Figures 1 and 3, there beingone of saidcollars on each side of each hub 10 of each spider. These collars arepreferably split for convenience in assemblingso that they need not bepassed over the end of the shaft, and as shown, particularly in Figure3, the halves of each collar are provided at their meeting edges withflanges 20 secured together in mounting the collars on the shaft bymeans of bolts 21. V Y

The arrangement described, which is shown in side elevation in Figure 5,provides in the instance of each striker or pendulum member 15 a pivotalsupport for the inner ends of each pair of arms 17 at 18 on each sideofthe hub member 10 of the corresponding radial frame or spider 9 so thateach one of the weights or strikers 16 is' located in the plane of theradial arms 11 of the frame and between two adjacent arms 11 so that itcan swing into contact with either and from one to the other, its pathof oscillation being thus limited. 1 In the form of the invention shownthere are three of the striker members or elements 15, for each framemember or spider 9 and each of these frame members has six radial arms11, and in accordance with the preferred arrangement illustrated, thereis one striker element or member 15in every alternate space 22between'the' radial arms 11 though this number and the arrangement ofthe spider and other details may be varied to suit the requirements andthere are preferably a plurality of sets of striker members or elements,one cooperating with each radial frame or spider 9. r

In the operation of the machine, the screen container 1, is driven inany suitable manner. In accordance with the normal operation of themachine illustrated, the screen member 1 is driven in rotation at aspeed which may be described in round numbers as approximating twentyrevolutions per minute for the six foot cylinder. While the speed is notprimarily essential, the device of the invention operates mostefficiently with a slow motion of the screen, particularly when thescreen is driven in rotation.

With a slow motion of the screen as described, the striker members 15are operated mainly by gravity cooperating with the motion of the screenso that the weights 15 strike against the radial members 11, each ofsaid members 15 being operated to give two such strokes or blows foreach revolution.

Assuming that the cylinder rotates in a right handed or clockwisedirection as seen in Figure 3, the cycle of operations of any one of thestriker members 15 is as follows, taking for example the member 15 whichis hanging downwardly in vertical position in Figure 3. As the cylinderrotates, this member 15 is carried upwardly and tothe left by 'thearm'll of the spider with which it is shown in contact until itpasses'the top center and becomes overbalanced on the righthand side ofthe pivot 18, at which time it swings downwardly and tothe right awayfrom said arm 11 as illustrated in dotted-lines in Figure 3, there beingno striker'member occupying the position, relatively to the otherstrikers shown of the one shown in dotted lines in this figure. At theend of the stroke the middle point or substantially the middle point ofwhich is illustrated in Figure 3, in dotted lines, the weight 16 comesin forcible contact with the radial arm 11' below the striker 15 asshown in dotted lines, imparting a correbottom center position. It willbe understood that at this time the striker member 15 is on the righthand side of the corresponding radial arm 11, i. e., on the rear side inthe direction of rotation. After it passes the lac bottom center andmoves upwardly and to the left through a certain are its slight momentumand inertia being overcome by the force of gravity, it swings backwardlyin lefthanded revolution toward the next radial arm 11 in thisdirection. It will be understood that at the same time this radial arm11 to the rear of the weight moves forwardly in right handed rotation sothat the rearward motion of the striker member and the forward motion ofthe radial arm 11 of the spider are combined to bring these two membersin contact and effect a secondary blow or stroke of less magnitude thanthat accomplished by the same striker immediately after it passes thetop center.

The operation of each of the strikers is identical with that of thesingle striker as just described so that each striker comes in contactwith the spider twice in each revolution, giving it a cycle ofoperations comprising a primary stroke, blow or vibration and asecondary stroke of less magnitude than the primary stroke. In this waywith the cylinder rotating at a speed of twenty revolutions per minutewhich has been assumed for example and each spider being equipped withthree strikers, which number has also been assumed for example, thestrikers cooperating with each spider will give one hundred and twentyblows or vibrations per minute. For convenience of illustration and toshow that there are normally a plurality of sets of strikers cooperatingwith a plurality of spiders in each cylinder, the present apparatus isshown as equipped with two spiders each cooperating with a set of threestrikers so that operating as described the vibrating 7 elements willproduce two hundred and forty vibrations perminute, eliminating any andall tendency of the apparatus to become clogged by accumulation ofmaterial in the screen apertures. It will be further noted, as alreadypointed out, that theoperation of the vibrator is incidental to theoperation of the rotary screen requiring no additional power and that itis further of simple and cheap construction and practically incapable ofgetting out of order.

I have thus described specifically and i detail an apparatus embodyingthe features of my invention in the preferred form in order that thenature and operation of the same may be fully understood. However, thespecific terms herein are used descriptively rather than in a limitingsense, the scope of the invention being defined in the claim.

hat I claim as new and desire to secure by Letters Patent is:

The combination in a fertilizer screening machine of a rotating cylinderhaving walls of foraminous material, the cylinder having a central shaftand radiating spokes supporting the foraminous material, a flange surrounding the shaft on each side of the spokes of one set and a pluralityof swinging pendulumlike weights each located between two adjacentspokes, a pair of arms supporting each of said Weights, one on each sideofthe spokes and immediately adjacent the same,

each said arm being pivotally mounted at one end on one sa d flangewhereby each weight is permit-ted to swing in the plane of the AUGUSTUSJ. SAGKETT.

